sr filter command get Segmentation fault

[Steven Liu]

Summary of the bug:
How to reproduce:

[root@chinaffmpeg sr]# ./ffmpeg -v debug -f lavfi -i nullsrc=s=320x240 -vf "sr=dnn_backend=2:model=2:scale_factor=4" -y a.ts
ffmpeg version N-92000-g59256de Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  configuration: --enable-ffnvcodec --enable-gpl --enable-libtensorflow
  libavutil      56. 19.101 / 56. 19.101
  libavcodec     58. 30.100 / 58. 30.100
  libavformat    58. 18.102 / 58. 18.102
  libavdevice    58.  4.103 / 58.  4.103
  libavfilter     7. 32.100 /  7. 32.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100

Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'lavfi'.
Reading option '-i' ... matched as input url with argument 'nullsrc=s=320x240'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'sr=dnn_backend=2:model=2:scale_factor=4'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option 'a.ts' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url nullsrc=s=320x240.
Applying option f (force format) with argument lavfi.
Successfully parsed a group of options.
Opening an input file: nullsrc=s=320x240.
detected 4 logical cores
[Parsed_nullsrc_0 @ 0x399e880] Setting 's' to value '320x240'
[Parsed_nullsrc_0 @ 0x399e880] size:320x240 rate:25/1 duration:-1.000000 sar:1/1
[AVFilterGraph @ 0x399d800] query_formats: 2 queried, 1 merged, 0 already done, 0 delayed
[lavfi @ 0x399c9c0] All info found
Input #0, lavfi, from 'nullsrc=s=320x240':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0, 1, 1/25: Video: rawvideo, 1 reference frame (I420 / 0x30323449), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 0/1, 25 tbr, 25 tbn, 25 tbc
Successfully opened the file.
Parsing a group of options: output url a.ts.
Applying option vf (set video filters) with argument sr=dnn_backend=2:model=2:scale_factor=4.
Successfully parsed a group of options.
Opening an output file: a.ts.
[file @ 0x39e0180] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[rawvideo @ 0x39a0a00] PACKET SIZE: 115200, STRIDE: 480
[Parsed_sr_0 @ 0x39e2d00] Setting 'dnn_backend' to value '2'
[Parsed_sr_0 @ 0x39e2d00] Setting 'model' to value '2'
[Parsed_sr_0 @ 0x39e2d00] Setting 'scale_factor' to value '4'
Segmentation fault (core dumped)
[root@chinaffmpeg sr]#

[Steven Liu]

​https://patchwork.ffmpeg.org/patch/10466/

have sent a patch for fix this ticket.

[Steven Liu]

fixed by commit id: 4b0033220361a6b61454da84f8bdf7f801ceda52